ui: Add 'size->number'.

* guix/scripts/gc.scm (size->number): Remove.
* guix/ui.scm (size->number): New procedure.
* tests/ui.scm ("size->number, bytes",
  "size->number, MiB", "size->number, GiB", "size->number, 1.2GiB",
  "size->number, invalid unit"): New tests.

1 files changed, 24 insertions, 1 deletions

diff --git a/tests/ui.scm b/tests/ui.scm
index 08ee3967a8..886223ef54 100644
--- a/tests/ui.scm
+++ b/tests/ui.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -166,6 +166,29 @@ interface, and powerful string processing.")
   #f
   (string->duration "d"))
 
+(test-equal "size->number, bytes"
+  42
+  (size->number "42"))
+
+(test-equal "size->number, MiB"
+  (* 42 (expt 2 20))
+  (size->number "42MiB"))
+
+(test-equal "size->number, GiB"
+  (* 3 (expt 2 30))
+  (size->number "3GiB"))
+
+(test-equal "size->number, 1.2GiB"
+  (inexact->exact (round (* 1.2 (expt 2 30))))
+  (size->number "1.2GiB"))
+
+(test-assert "size->number, invalid unit"
+  (catch 'quit
+    (lambda ()
+      (size->number "9X"))
+    (lambda args
+      #t)))
+
 (test-end "ui")